Winch



Dec. 28, 1943. M. R. ROBINSON 2,337,772

WINCH Filed Oct. 21, 1940 3 Sheets-Sheet 1 A TTORNEYS.

Dec. 28, 1943. M. R. ROBINSOAN 5 Sheets-Sheet 2 WINCH Filed Oct. 21, 1940 472'. fiw/Jv'm/m INVENTOR.

ATTORNEY5.

Dec. 28, 1943. M R' @BINSON 2,337,772

WINCH Filed Oct. 21, 1940 3 Sheets-Sheet 5 fiayes @75- 767 147 WVENfoR.

(96M 7 W I ATTO/P/VEVi UNITED STATES PATENT Mayes-B. Robinson,

by mesne assignments, of one-third WINCH Bnrllngame, OaIiL,

assignor, to Charles H. Grant, San Francisco, Calm; one-third to Frank P. Lawler, Chicago, 111.: and one-third to Paul J. Tyler, Orovlile,0a1ii'.

Application October 21, 1940, Serial No. 362,087 1 Claim. ci. 254-185) My invention relates to new and useful improvements in winches, more particularly to winches intended to be attached to the rear ends of tractors, to be driven by the power take-oil 2i, under swivelled fairlead sheave 22, and thence to the work (not shown).

The upper fairlead sheaves I 8 are meunted on two pedestals 23, which in turn are carried by the shaft of the tractor, and still more particularly to 5, m -P r being Preferably Welded twmdrum winches for such thereto. The lower fairlead sheaves 19 are The principal object of my present invention is swlveled between a plate cen'led end to devise a winch wherein each drum is rigidly erebly welded Pedestals 33; and a boss 89, carried by and preferably welded to, deck-plate 24. mounted so as to preserve its alignment. a further object is to mount rigidly the i'air- Deck-Plate sewed as by b1ts a leads control levers and associated mechanism jecuon H of the mam gear Pedestals bl braced by a plate '12, preferably on a part rigidly braced to the tractor, and which 23 58 3 5 serves as a guard for the winch machinery The main gear case 25 has a circular flange 20 still further object is to provide means for for rigid attachment by bolts to an adaptor 21, holding either drum released for free wheeling. which in tum is secured to the rear end of the In addition to principal objects, above stated, tractor The use of an adaptor enables one I have worked out a number of novel and useful standaljd type of winch to be bunt and then to be details, which will be readily evident as the 'defitted to any tractor s-crlpflon progresses Braces 28 are attached by bolts to deck plate. My invention consists in the parts and m 24 and secured to the rear end of the tractor by the combination and arrangement thereof, which bolts k the adaptor they vary according to are defined in the appended claims, and of which the that one embodiment is exemplified the acccmpany' Each clutch and brake is actuated as will now ing drawings, which are hereinafter particularly 25 be described, as to the right hand clutch described and explained. brake. Throughout the description the same refer The dead end of clutch band I3 is pivoted on a ence number is applied the same member lug 29 secured as by welding to the lower side of Similar members, deck-plate 24. Brake band 14 is similarly piv- Figure 1 is a side elevation of my winch. 30 oted on mg 30. Figure 2 'is a plan view, partly in section, taken The live end of clutch band |3 is pivoted on along the me of Figure the lower end of a short rod 8i, which passes up- Figure 3 is a vertical section, taken along the wardly through a hole m t deck p1ate, 3 of Figure and illustrating one of the pression spring 32, bearing against the bottom of sets of Planetary gears my Winehi the deck-plate and the head of rod 8i, tends to Figure 4 is a front elevation, taken along the force the clutch band to unset. The upper end 111 -4 1 F u v a of rod 3| passes through a hole in the short end Figure 5 is a rear elevation of a Portion of my of lever 38, and carries an adjusting nut 34 which winch. taken along the line of Figure bears on this lever; The lever is pivoted on a lug Figure is an enlarged side elevation the 40 35 upstanding from deck-plate 24. The long end brake cam assembly of my Winch, taken along of the lever carries a roller. 38, which bears on line of Figure a cylindrical cam surface 31, i Figure '7 is an enlarged side elevation of the similarly t live end of brake band a is clutch Cam assembly 1' my Winch, taken @10118' oted on the lower end of a long rod 38, which has l ne 1-1 of ure 5. adjusting nut 39, bearing on lever 40, which car- Turning now p i y to Figure we see ries roller 4i, riding on cam surface 42. Spring that y W c c sists primarily i w d m I I, 43 corresponds to spring 32. But this assemblage 1 ea h a tuated y nt nal pla tary gearrequires an additional adjustable spring 44, in Drum II is o tr le y clutch l3 and stronger than spring 43, to set the brake whenbra e 4- rum I2 is similarly controlled by so ever permitted by cam surface 42 and roller 4|. clutch i5 andbrake i6. The two cam surfaces 31 and 42 are integral R pe I1 extends. fro d um over fa d with cylinder 45, which in turn is rotated by consheave it, under swivelled fairlead sheave l9, and trol-handle 4 8. I thence to the work (not shown). Rope 20 simi; Comparing Figures 6 and 7, we see that the oplarly extends, from drum I2, over fairlead sheave t5 eration of my two-cam control is as follows. Fig- OFFICE A ure 6 shows the brake control, and Figure 'I shows the clutch control. As shown, the controls are in neutral.

Rotating the cylinder 45 to the right in those figures, first brings cam surface 31 to bear on the clutch roller 35, depressing the roller, and hence (see Figure 1) raising the lever 33, thus pulling up on rod 3|, and thus beginning to set clutch i3.

Note that the brake is still set. Thus we have an operating overlap between brake and clutch, and so the load will not drop, as it would if there were an intervening lag between putting the brake oil and the clutch on. But, due to the nature of the brake band, it being a one-way brake, it will drag when the clutch is first set, thus only negllgibly impeding the rotation of the winch drum.

(The apparent inconsistency between Figure 1 on the one hand and Figures 6 and 7 on the other hand, is due to the fact that in Figure 1 the brake control mechanism is beyond the cylinder 45 [this fact being indicated by the dotted lead-line to reference number 4| in that figure], and hence the brake cam surface 42 in Figure 1 appears'reversed from the showing of that surface in Figure 7.)

Further rotation of cylinder 45 to the right completely sets the clutch by completely de-' pressing roller 38. At the same time roller .41 rides up on cam surface 42, against the compression of spring 44 (see Figure 5), thus (see Figure 1) depressing lever 40, thereby slacking-up on rod 38 (see Figure 3) and thus permitting spring 43 to unset brake l4.

This setting the clutch before releasing the brake, and thereafter releasing the brake, is in accordance with, and dominated by, Patent No. 1,563,568, issued December 1, 1925, to Hoar.

Rotation of cylinder 45 to the left in Figures 6 and 7 will not affect clutch roller 35, and thus will leave the clutch still unset, but again brake roller 4| will ride up on cam surface 42, thus releasing the brake as already described. When thus fully released, the roller 4| comes to rest in a notch 5| on cam surfac 42, thus'enabling the assm'm internal gear 65 is constrained to rotate with brake drum 65 built integral with winch drum I l.

Winch drum I I is iournally supported on a hub extension 81 which forms an integral part (this being a feature of my invention) of gear case 25. In certain of the'claims the gear case will be described as T-shaped," hubs B'I constituting the arms of the T, and the main gear case 25 constituting the stem of the T. See Figure 2.

Let us now turn to Figure 3, and assume that shaft 51 and sun gear 58 impelled thereby are rotating counterclockwise and that spiders 8|, 52 are held ,fast from rotating, by the pressure of clutch I3 on clutch drum B4. Inasmuch as pins were held stationary'by the non-rotation of the spiders, planet gears 59 will be impelled, by the clockwise rotation of sun gear 58, to rotate clockwise, thus rotating internal gear 65 clockwise, and carrying winch drum H with it, to wind up the cable.

If now, however, clutch i3 is released and brake I4 is set, brake drum 58, winch drum H and internal gear 65 are all constrained against rotation, and the counterclockwise rotation of sun gear 58 will carry planet gears 58 rotating around it, each rotating clockwise but traveling bodily operator to let go the handle 46, and leave thebrake locked unset, in spite of brake-setting spring 44.

Pivotally mounted on the top of cylinder 45 is cap 41, rotated by control-handle 48. By means of rod 49, cylinder on the other side of the winch rotates synchronouslywith cap 41, .and thereby controls clutch l5 and brake IS in manner identical to the control of clutch l3 and brake i4 already described.

I shall now describe the operation of the planetary system of one winch. The power take-oil shaft 52 is connected by a collar 53 to aligned shaft 54, which carries bevel pinion 55; This pinion drives bevel gear 55 on cross shaft 51.

Cross-shaft 51 carries sun gear 58. Planet gears 59 are carried by pins 60 which in turn are supported by spiders'il, B2, appropriately journaled on shaft 51, and joined together by stiffeners 63 between the planet gears. 54 is constrained to rotate with these spiders. An

Clutch drum 65 counterclockwise, rolling on the internal teeth of internal gear 65.

If both the clutch and the brake are set simultaneously, the clockwise rotation of brake drum 55'will have sufllcient tendency to unset the brake, against the pressure of spring 44, so that the brake will but little impede the hauling-in of rope H by winch drum I I.

The deck-plate 24, in addition to supporting the fairleads, the cam-cylinders, the pivots for the cam roller levers, and the dead ends of the brake and clutch bands, and being tied securely to the tractor-by braces 28, serves as a dirt-guard for the winch drums and planetary machinery.

Having now described and illustrated one form of my invention, I wish it to be understood that my invention is not to be limited to the specific form or arrangement of parts herein described and shown, except insofar as specifically covered by my claim.

I claim:

In a winch, the combination of a T-shaped gear casing having the arms of the T integral with its stem, a drive shaft in the stem, a driven shaft in the arms, gears to connect the two shafts operatively, a winch drum iournaled about each arm, two planetary transmissions, one being mounted at the end of each arm and operatively connecting the driven shaft to its respective drum to selectively drive, release or hold said drum, a dirt-guarding deck plate firmly attached to and overlying the T-shaped-casing, fairleads for the two drums, mounted on the deck plate, clutch bands and brake bands constituting a part of the two planetary systems, dead ends for these bands mounted on the deck plate, controls for these bands mounted on the deck plate, and braces between the deck plate and the tractor to which the winch is to be attached.

MAYES R. ROBINSON. 

